Pseudo-dynamic test and quasi-static test of full-scale model of a two-story brick building retrofitted with prestressed tendons
Liu Hang Han Mingjie Lan Chunguang Wang Tao Tian Yuji
1. Beijing Building Construction Research Institute, Beijing 100039，China;
2. Beijing Jiaotong University, Beijing 100044, China;
3. Engineering Mechanics, China Earthquake Bureau, Langfang 065201, China
Abstract： A new seismic retrofitting method with vertical unbonded prestressed tendons adopted is proposed to improve the seismic behavior of brick structure．To investigate the retrofitting effects, a full-scale two-story brick building was built and tested under the pseudo-dynamic load and quasi-static load, respectively. The dynamic behaviors and the displacement responses of the building in different directions and with different magnitudes of pseudo-dynamic load were measured, and the failure modes and the mechanical behaviors under the quasi-static load were studied. It is observed that the original brick building, which has a seismic fortification intensity less than 8 degree before the seismic retrofitting, may remain in the elastic state when it is subjected to the pseudo-dynamic impact equivalent to a strong earthquake of 9 degree seismic fortification intensity (620gal) after the seismic retrofitting; the obtained shear capacity in two directions is equivalent to 1.24 and 1.41 times the total weight of the building, respectively, indicating that the seismic capacity of the brick building has been significantly improved. Meanwhile, the load-displacement hysteretic loops are full and the descending portion of the skeleton curve is flat, exhibiting good energy dissipation capacity and deformability. In addition, when the lateral loads are removed, the position restoration behavior of the building can be improved significantly by the prestressed tendons, which is helpful for avoiding the collapse of the building during a strong earthquake.
刘 航 韩明杰 兰春光 王 涛 田玉基. 预应力加固两层足尺砖砌体房屋模型抗震性能试验研究[J]. 土木工程学报, 2016, 49(3): 43-56.
Liu Hang Han Mingjie Lan Chunguang Wang Tao Tian Yuji. Pseudo-dynamic test and quasi-static test of full-scale model of a two-story brick building retrofitted with prestressed tendons. 土木工程学报, 2016, 49(3): 43-56.
